444. 207. Leucantha. 39. COMPOSITiE, B. Pl.ex.caL 



ovate ; pappus bristlelike, shorter than the akenium ; rays 

 rough. — Stem branched; iipper leaves decurrent; calathides 

 solitary, terminal; cwoUcb golden yellow. 



Leucantha cyanifolia. Bluebottle yellow- this tie. 



Leaves decurrent, woolly, lanceolate, not cut; root-leaves 

 lyrate ; calathide solitary ; spines of the pericline straight, 



Carduus stellatus luteus foliis cyani, Eaii Syn, 196,2. 

 Carduus solstitialis, Ger. em. 1166, 2. 

 Carduus solstitialis Dodonaei, Park, 989. 

 Centaurea solstitialis, Lin. S. P. 1 197. 

 Saint Barnahifs thistle. 



Fields and hedges ; annual ; July and August. 

 Stem 2 feet high, branched, many-flowered ; root-leaves 

 denticulated. 



C. CoRYMBiFER^. Calathldes flosculous, or radiated; 

 dinanthus scarcely fleshy, or not at all ; style not jointed at 

 the base of the lobes. 



a. Pappus ; dinanthus naked. 

 Calathides flosculous Artemisia. 212. 



h. Pappus 1 dinanthus naked ; calathides radiated. 



Rays white; pericline-scales equal, in 

 two series Bellis. 220. 



Rays white; pericline flattish; scales 

 imbricate, herbaceous ChAmomilla. 219. 



Rays white; pericline hemispherical; 

 scales imbricate, coriaceous Leucanthemum. 216. 



Rays yellow; pericline hemispherical; 

 scales imbricate; akenia uniform Chrysanthemum. 215. 



Rays yellow ; pericline-scales in one 

 series ; akenia diffbrm, boatshape Calendula. 208. 



c. Pappus 0; dinanthus villous or chaffy. 



Calathides flosculous; dinanthus villous 



Absinthium. 21.S. 



Ca/a^/j. flosculous ; cli?iant/ms chaffy Diotis. 214. 



Calath. radiated; dinanthus naked below; 

 chaffy above; chaffs linear Maruta. 222. 



Calath. radiated; rays ovate, short; 

 dinanthus chafly ; chaffs linear Achillea. 224* 



